about distance

[Yaoxingtian]

hi, could you pls. help explain the pose output：position and orientation.
is the position means real distance ?

pose:
position:
x: -0.7781473994255066
y: -0.21098142862319946
z: 0.8552718758583069
orientation:
x: -0.3901138536836507
y: 0.6870443043743111
z: -0.5281226612457122
w: 0.3112358585858271

thanks so much!